Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue	$ 704,267	$ 616,653
Salaries, wages and benefits (including equity-based compensation expense of $7,629 and $7,925, respectively)	391,177	335,762
Professional fees	41,125	36,911
Supplies	26,021	23,699
Rents and leases	11,424	11,249
Other operating expenses	90,838	81,425
Depreciation and amortization	31,569	28,926
Interest expense, net	19,999	15,787
Transaction-related expenses	6,471	3,582
Total expenses	618,624	537,341
Income before income taxes	85,643	79,312
Provision for income taxes	19,085	17,402
Net income	66,558	61,910
Net income attributable to noncontrolling interests	(543)	(1,073)
Net income attributable to Acadia Healthcare Company, Inc.	$ 66,015	$ 60,837
Earnings per share attributable to Acadia Healthcare Company, Inc. stockholders:
Basic	$ 0.73	$ 0.68
Diluted	$ 0.72	$ 0.67
Weighted-average shares outstanding:
Basic	90,101	89,258
Diluted	91,391	91,012